Bulletin 23 Abstract: A large fauna of arenaceous Foraminifera comes from exposures of the Brassfield Limestone (Albion Series, Silurian) in Franklin, Ripley, Jefferson, and Clark Counties, southeastern Indiana. It consits of 14 genera and 26 species of the families Saccamminidae and Rhizamminidae Brady, Hyperamminidae Eimer and Fickert, and Tolypamminidae Cushman. The ammodiscids are here assigned to the latter family family, which is particularly characteristic of the Brassfield fauna. Stomasphaera and Amphicervicis are new genera; new species are S. brassfieldensis, A. elliptica, and A. hemisphaerica. The foraminifers that generally have been assigned to the genus Ammodiscus Reuss should be called Involutina Terquem. The genus Turritellella Rhumbler, two species of Glomospira Rzehak, two of Sorosphaera Brady, and one of Psammosphaera Schulze are here reported for the first time from older rocks considered to be Albion in age. Altogether, the Brassfield gauna has as close a percentage relationship to Niagaran faunas as it has to earlier described Albion faunas.

Mound, M. C. 1961, Arenaceous foraminifera from the Brassfield Limestone (Albion) of southeastern Indiana: Indiana Geological Survey Bulletin 23, 38 p., 5 fig., 3 pl.

You may also like:

Keywords: paleontology, Silurian, Brassfield Limestone, foraminifera, fossil

Can't find what you're looking for? Feel free to contact us directly:

Publication Sales Office
Indiana Geological and Water Survey
420 N. Walnut St.
Bloomington, IN 47404
812-855-7636 (phone)
812-855-2862 (fax)

IGS Return Policy

All sales are final. Materials may not be returned after they have been accepted by the customer. Any discrepencies in mail orders must be reported to IGWS within 10 days of receipt of order.

The Indiana Geological and Water Survey will refund the purchase price and sales tax of products if returned with the original sales receipt within 10 days of receipt of order. Refunds will be issued with the same method of payment as indicated on the original receipt except for cash purchases, which will be refunded by check. Items must be returned in the same condition as purchased. Refunds on digital products and services are not allowed, except for defective media such as CD-ROMs, flash drives, and so on. The customer is responsible for paying shipping costs to return items.